1 BOOL CWnd::DestroyWindow()
 2 {
 3     CWnd* pWnd;
 4     CHandleMap* pMap;
 5     HWND hWndOrig;
 6     BOOL bResult;
 7 
 8     if ((m_hWnd == NULL) && (m_pCtrlSite == NULL))
 9         return FALSE;
10 
11     bResult = FALSE;
12     pMap = NULL;
13     pWnd = NULL;
14     hWndOrig = NULL;
15     if (m_hWnd != NULL)
16     {
17         pMap = afxMapHWND();
18         ENSURE(pMap != NULL);
19         pWnd = (CWnd*)pMap->LookupPermanent(m_hWnd);
20 #ifdef _DEBUG
21         hWndOrig = m_hWnd;
22 #endif
23     }
24 
25     if ((m_hWnd != NULL) || (m_pCtrlSite != NULL))
26     {
27         if (m_pCtrlSite == NULL)
28             bResult = ::DestroyWindow(m_hWnd);
29         else
30             bResult = m_pCtrlSite->DestroyControl();
31     }
32 
33     if (hWndOrig != NULL)
34     {
35         // Note that 'this' may have been deleted at this point,
36         //  (but only if pWnd != NULL)
37         if (pWnd != NULL)
38         {
39             // Should have been detached by OnNcDestroy
40 #ifdef _DEBUG
41             ASSERT(pMap->LookupPermanent(hWndOrig) == NULL);
42 #endif
43         }
44         else
45         {
46 #ifdef _DEBUG
47             ASSERT(m_hWnd == hWndOrig);
48 #endif
49         // Detach after DestroyWindow called just in case
50             Detach();
51         }
52     }
53 
54     return bResult;
55 }